# Grade - examples - page 214

1. Carla Carla is 5 years old and Jim is 13 years younger than Peter. One year ago, Peter’s age was twice the sum of Carla’s and Jim’s age. Find the present age of each one of them.
2. Mixture 2 How many liters of water must be added to 7 liters of a 20% solution to obtain a 10% solution?
3. Taxi A taxi ride costs \$3 plus \$2.50 per mile. Write and Graph an equation in two variables that represents the total cost of a taxi ride.
4. Hr to min Sue biked to school in 5/12 of an hour. How many minutes did it take her to ride to school?
5. A large A large gear will be used to turn a smaller gear. The large gear will make 75 revolutions per minute. The smaller gear must make 384 revolutions per minute. Find the smallest number of teeth each gear could have. [Hint: Use either GCF or LCM. ]
6. Factors 2 A number has 3 identical factors. If 1 of them is 18. Find the number step by step
7. Maria Maria has decided to plant grapes in the garden behind her house. His neighbor Ben has grown grapes successfully for a long time and has given Maria advice on how to plant vines. Ben told her to plant them 3 meters apart in rows that are also 3 meters apar
8. Imagine Imagine that a unit of air at a temperature of 25°C rises up a mountain range that is 3,000 meters high on the windward side and which descends to 1,200 meters on the leeward side, assuming that the air will remain dry what will its temperature when it cro Alaska is the largest state in the United States and has a surface area of approximately 588,000 square miles. Montana has a surface area that is approximately 25% of the surface area of Alaska. What is the approximate surface area of Montana?
10. Area to perimeter Calculate circle circumference if its area is 254.34cm2
11. The volume 2 The volume of a cube is 27 cubic meters. Find the height of the cube. 5 triangles + 1 square = how many sides in all
13. Medians 2:1 Median to side b (tb) in triangle ABC is 12 cm long. a. What is the distance of the center of gravity T from the vertex B? b, Find the distance between T and the side b.
14. A perineum A perineum string is 10% shorter than its original string. The first string is 24, what is the 9th string or term?
15. Rocket start The body launched vertically up returns to the start site in 6 seconds. What height did it have?
16. Geometric progression 4 8,4√2,4,2√2
17. Sand castle Tim and Tom built a sand castle and embellished it with a flag. Half the pole with the flag plunged into the castle. The highest point of the pole was 80 cm above the ground, its lowest point 20 cm above the ground. How high was the sand castle? Add two mixed fractions: 2 4/6 + 1 3/6 If a cylindrical tank with volume is used 12320cm raised to the power of 3 and base 28cm is used to store water. How many liters of water can it hold? Mang Elio went to his laboratory at 7:00am And recorded that the temperature was 11.07°C. At lunchtime, the temperature rose by 27.9°C but dropped by 8.05°C at 5:00 PM. What was the temperature at 5:00 PM?